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Md2roffApplication · Md2roff Project

CVE-2022-34913

CRITICAL · 9.8 CVSS v3.1 Published 2022-07-02
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
md2roff 1.7 has a stack-based buffer overflow via a Markdown file containing a large number of consecutive characters to be processed. NOTE: the vendor's position is that the product is not intended for untrusted input

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

md2roff 1.7 contains a stack-based buffer overflow vulnerability that can be triggered by processing a Markdown file containing a large number of consecutive characters. The overflow occurs during character processing in the markdown-to-roff conversion, potentially allowing an attacker to overwrite stack frames and achieve arbitrary code execution.

MitigationSince the vendor states md2roff is not intended for untrusted input, ensure the tool is only used with trusted, locally-controlled Markdown files and avoid processing any input from untrusted or external sources.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Md2roffApplication
Affected:= 1.7

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check if md2roff is installed
    Run 'md2roff --version' or 'which md2roff' to locate the binary
    Affected if md2roff is not found on the system - not applicable
  2. Verify md2roff version
    Run 'md2roff --version' and compare the output to version 1.7
    Affected if The installed version is exactly 1.7
  3. Confirm markdown file processing
    Check if md2roff is being invoked to convert markdown files to roff format - review any scripts, cron jobs, or applications that call md2roff
    Affected if md2roff is being used to process markdown files from any source
  4. Identify input sources
    Review logs, workflows, or configurations to determine where markdown input files originate that are processed by md2roff
    Affected if Input files come from sources that are not locally-controlled or trusted

A user is affected if md2roff version 1.7 is installed and is processing markdown files containing a large number of consecutive characters.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Since the vendor states md2roff is not intended for untrusted input, ensure the tool is only used with trusted, locally-controlled Markdown files and avoid processing any input from untrusted or external sources.

Fix this in Md2roff Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,840
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-34913 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data